Cooling apparatus boiling and condensing refrigerant with improved tunnel structure

A cooling apparatus boiling and condensing refrigerant:

• comprising a refrigerant container with a structure in which plural intermediate plates having plural openings penetrating therethrough in the direction of their thickness are stacked and both ends of the stacked intermediate plates, in the direction of stacking, are stacked by external plates, respectively, to form an inner space by the plural openings, within which a refrigerant is stored;
• wherein
• a heat-generating member, which is attached to the surface of the external plate and from which the refrigerant stored in the refrigerant container receives heat and is evaporated into vapor, is cooled by releasing the latent heat of the refrigerant vapor to the outside;
• wherein
• the intermediate plates include a first intermediate plate and a second intermediate plate that are stacked sequentially upon the external plate;
• wherein
• if the openings provided in the first intermediate plate are referred to as first openings and the openings provided in the second intermediate plate are referred to as second openings, then the first openings and the second openings communicate with each other and the opening dimension of the communicating sections is smaller than that of the first openings;
• and wherein
• the first intermediate plate has communication paths through which the plural first openings communicate with each other.